Device eor operating the index of time-registers



R. McKENNA.

Time Register.

Patented May 31, 1859.

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UNITED STATES PATENT OFFICE.

ROBERT MOKENNA, OF ROSSVILLE, TENNESSEE.

DEVICE FOR OPERATING THE INDEX OF TIME-REGISTERS.

Specification of Letters Patent No. 24,224, dated May 31, 1859.

To all whom it may concern:

Be it known that I, ROBERT MoKENNA, of Rossville, in the county of Fayette and State of Tennessee, have invented a new and useful Instrument for Registering and Timing Events, the construction and operation of which I have described in the following specifications and illustrated in the accompanying drawings with sufficient clearness to enable competent and skilful workmen in the arts to which it pertains or is most nearly allied to make and use said invention.

Figure 1 is a front elevation. Fig. 2 is back elevation. Fig. 3 a transverse sectional elevation.

Similar letters of reference in each of the several figures, indicate corresponding parts.

The nature of my invention consists in making an ordinary spring clock, in combination with my invention register and time events.

In constructing my instrument a hole is drilled through the main shaft of a clock a. In it I insert shaft Z). On the front end of shaft (4 is fastened pinion c, and on the back end of the same shaft is fastened the disk 6. The wheel f, has three pins 9, of equal distance so that when the disk 6, hangs perpendicular its periphery touches two of those pins, so that the wheel f, cannot move either way without raising or lowering the pencil 2', on the dial m. Rack 71, works in pinion c, and has pencil z' fastened to its forward end. The indicator 7', is permanently attached to the main shaft of the clock a, and moves with it.

70 is the prime-mover of the instrument.

Z, is a shaft leading to the truck wheel of the engine or any other machine whose time is to be registered. m, is the dial; a, part of the clock.

Its operation is as follows viz: IVhen the engine is stationary and the clock moving, the pinion 0, will be stationary, and as the indicator j moves, the rack it, is moved toward the outside of the dial 022-, forming a scroll, until the pencil 2', touches the end of the slot in the indicator 7'. To set the instrument again it is necessary to remove the disk 6, and run the pencil back to the end of the slot nearest the center of the dial m. \Vhen the engine is in motion and the clock running the pencil and indicator move as before, with this addition that as the disk 6, is moved by the pins 9, to the right the pencil will indicate a short curve below the scroll line formed on the dial by the movement of the clock. The length of this curve is determined by the speed of the engine. If the disk 6, is moved to the left by the backing of the engine the curve indicated will be above the scroll line. Each curve indicated by the pencil above or below the scroll line indicates a mile either backward or forward as the case may be. One revolution of the wheel indicates three miles. The number of small curves indicated between two figures on the outside of the dial m, will give the number of miles run in that hour.

hat I claim and desire to secure by Letters Patent, is

The moving of the pencil in the manner described.

ROBERT MOKENNA.

Witnesses:

D. H. FEGER, CHAS. F. MoLrron. 

